SoloSwap™ LS Mock Engine Block – No Head Included

The SoloSwap™ LS Mock-Up Engine Short-Block from Speedway Motors is the ultimate tool for testing LS engine fitment and planning your swap without the hassle. Designed with heavy-duty 12-gauge steel, this mock block replicates all Gen 3 and Gen 4 LS block sizes, ensuring compatibility with LS1, LS2, LS3, LS6, LS7, LSA, and Vortec truck engines (4.8L–6.2L). The short-block version accepts both stock and aftermarket LS cylinder heads, making it ideal for mock-ups, mount fabrication, and component clearance checks.

Weighing just 18 pounds, this lightweight mock block can be easily handled by one person, eliminating the need for an engine hoist. Its simple assembly/disassembly allows for quick setup and flat storage, while the included hardware ensures hassle-free installation. Compatible with standard LS bolt-ons like intake manifolds, headers, and oil pans, this mock block streamlines your build process and removes the guesswork from your engine swap project.